IEC 60835-1-4-1992 Methods of measurement for equipment used in digital microwave radio transmission systems part 1 measurements common to terrestrial radio-relay systems and satel.pdf

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1、NORME CE1 INTERNATIONALE INTERNATIONAL STANDARD IEC 60835-1 -4 1992 AMENDEMENT 1 AMENDMENT 1 1995-01 Amendement 1 Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Partie 1 : Mesures communes aux faisceaux hertziens terrestres et aux stations

2、terriennes de tlcommunications par satellite Section 4: Qualit de transmission Amendment 1 Methods of measurement for equipment used in digital microwave radio transmission systems Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations Section 4: Transmission per

3、formance 0 CE1 1995 Droits de reproduction rservs - Copyright - all rights reserved Bureau Central de la Commission Uedrotechnique Intemationale 3. (u8 de VarembB Genve. Suisse C Commission Eiectrotechnique internationale international Eiectrotechnical Commission PRICE CODE MemavHapo,aHau Qnewrpoiex

4、uecnan HOMMCCHR COD E PRIX Pour prix. voir catalogue en vigueur Forprice, see current catalogue -2- 835-1-4 amend. 1 0 CEI:i 995 AVANT-PROPOS Le prsent amendement a t tabli par le sous-comit 12E: Faisceaux hertziens et systmes fixes de tlcommunications par satellite, du comit dtudes 12 de la CEI: Ra

5、d iocom m u n i cat i on s. Le texte de cet amendement est issu des documents suivants: DIS I Rapport de vote I Le rapport de vote indiqu dans le tableau ci-dessus donne toute information sur le vote ayant abouti lapprobation de cet amendement. Page 2 SOM MAIRE Ajouter, aprs larticle 3, le titre du

6、paragraphe suivant: 3.1 Taux derreur binaire rsiduel Page 12 3 Paramtres supplmentaires Supprimer le texte existant et le remplacer par le suivant: Le prsent paragraphe dcrit le taux derreur binaire rsiduel. Dautres paramtres additionnels sont actuellement tudis par dautres organisations internation

7、ales. 3.1 Taux derreur binaire rsiduel 3.1 -1 Dfinition et considrations gnrales Le taux derreur binaire rsiduel (TEBR) des quipements hertziens est un paramtre indispensable pour garantir la qualit de transmission du sytme. NOTE - Le TEBR est le taux derreur en absence dvanouissement. II fixe la li

8、mite pour les erreurs inhrentes au systme, en particulier celles dues aux effets de vieillissement, de lenvironnement et des interfrences long terme. 835-1-4 Amend. 1 0 IEC:1995 -3- FOREWORD This amendment has been prepared by sub-committee 12E Radio rela: communications systems, of IEC technical co

9、mmittee 12: Radiocommur and fixed satellite :ations. The text of this amendment is based on the following documents: Report on voting 12E(C0)165 12El243lRVD Full information on the voting for the approval of this amendment can be found in the report on voting indicated in the above table. Page 3 CON

10、TENTS After clause 3 add the following subclause title: 3.1 Residual bit-error ratio Page 13 3 Additional parameters Delete the existing text and replace by the following: This clause describes residual bit-error ratio. Other additional parameters remain under consideration by other international or

11、ganizations. 3.1 Residual bit-error ratio 3.1 .l Definition and general considerations Residual bit-error ratio (RBER) for digital microwave radio transmission systems is an indispensable factor to guarantee the system performance. NOTE - The RBER is the error ratio in the absence of fading and incl

12、udes allowance for system-inherent errors, environmental and ageing effects and long-term interference. -4- 835-1-4 amend. 1 0 CEI:1995 II y a lieu de mesurer le TEBR avec lquipement lessai fonctionnant dans les conditions normales. II convient de choisir un temps dintgration en utilisant une valeur

13、 donne par lquation (3-2) en 3.2. Les mesures du TEB sont effectues de faon rpte avec un temps dintgration fixe; le TEBR peut tre dfini comme la valeur la plus leve du TE6 non dpasse pour un pourcentage spcifi dintervalles dintgration. Une priode de mesure du TEB dune journe peut tre approprie. 3.1.

14、2 Mthode de mesure Le TEBR est obtenu en enregistrant les mesures du TEB (voir article 2), sur une longue priode, par exemple 24 h et en utilisant un long temps dintgration, par exemple 15 min. Ces temps pris en exemple sont relatifs des systmes dune capacit de transmission de lordre de 100 Mbit/s e

15、t de TEB de 1 x lo-. Dans le cas dquipments de faisceaux hertziens terrestres, il y a lieu, si cela est exig, deffectuer cette mesure avec les interfrences long terme, et en absence dvanouissement (voir la CE1 835-2-1 O). Dans le cas de systmes de tlcommunications par satellite, il faut appliquer un

16、 rapport porteur bruit lev (voir la CE1 835-3-12). La mesure du TEB doit tre enregistre afin dobtenir la valeur la plus leve de TE6 non dpasse pour un pourcentage spcifi dintervalles dintgration. II est conseill denregistrer en mme temps que le TEB la tension dalimentation, la temperature de la pice

17、, etc., afin didentifier toute cause derreur et de rejeter les mesures incorrectes dues aux effets de lenvironnement qui ne se produiraient pas dans le cas dune liaison relle. 3.1.3 Prsentation des rsultats Le taux derreur binaire rsiduel doit tre exprim comme la valeur la plus leve du TEB non dpass

18、e pour un pourcentage spcifi dintervalles dintgration. 3.1.4 Dtails a spcifier Si cette mesure est exige, les dtails suivants seront inclus dans le cahier des charges du matriel: a) accs entre lesquels les mesures doivent tre ralises; b) conditions principales dinterface telles que dbit binaire, niv

19、eau, impdance et code en ligne; c) niveau lentre du rcepteur; d) type et longueur de la squence de test; e) temps dintgration (par exemple 15 min et pourcentage des intervalles de temps dintgration afin de rejeter les priodes affectes de mesures incorrectes lors des essais en usine ou les priodes dv

20、anouissement lors des essais sur le terrain; f) taux derreur binaire rsiduel autoris pour le pourcentage spcifi dintervalles de temps dintgration ; g) temps de mesure totale (par exemple 24 h). 835-1-4 Amend. 1 0 IEC:1995 -5- The RBER should be measured with the equipment under test operating under

21、normal conditions. An integration time should be chosen using a value given by equation (3-2) in 3.2. The BER measurements are carried out repeatedly with the fixed integration time and the RBER may be defined as the highest BER not exceeded in a specified percentage of integration intervals. The BE

22、R measurement period of one day may be appropriate. 3.1.2 Method of measurement The RBER is obtained by taking BER measurements (see clause 2) over a long period, e.g. 24 h, using a long integration time, e.g. 15 min. These examples are related for systems with a capacity of about 1 O0 Mbit/s and an

23、 RBER of 1 x 1 O-”. In case of terrestrial radio-relay systems, the measurements should be carried out with long-term interference, if required, in the absence of fading (see IEC 835-2-10). In the case of satellite communication systems, a high carrier-to-noise ratio condition should be applied (see

24、 IEC 835-3-12). The measuring of the BER shall be recorded in order to obtain the highest BER not exceeded in a specified percentage of integration intervals. It is advisable to record the power supply voltage and room temperature, etc., at the same time as the BER, in order to identify any causes o

25、f error and to discard incorrect measurements produced by environmental effects which would not happen in a real link. 3.1.3 Presentation of results The residual bit-error ratio shall be expressed as the highest BER not exceeded in a specified percentage of integration intervals. 3.1.4 Details to be

26、 specified The following items should be included, as required, in the detailed equipment specif cat ion : a) ports between which the measurements are to be made; b) main interface conditions such as bit-rate, level, impedance and code format; c) receiver input level; d) type and length of the test

27、pattern; e) integration time (e.9. 15 min), percentage of integration time intervals in order to discard periods with incorrect measurements during factory tests or fading periods during field tests; f) permitted residual bit-error ratio for the specified percentage of integration time intervals; g)

28、 total measurement time (e.g. 24 h). ICs 33.060.30 Typeset and printed by the IEC Central Office GENEVA, SWITZERLAND NORME CE1 INTERNATIONALE INTERNATIONAL STANDARD IEC 60 8 35-1 -4 Premire dition First edition 1992-04 Mthodes de mesure applicables au matriel utilis pour les systmes de transmission

29、numrique en hyperfrquence Partie I: Mesures communes aux faisceaux hertziens terrestres et aux stations terriennes de tlcommunications par satellite Section 4: Qualit de transmission Methods of measurement for equipment used in digital microwave radio transmission systems Part 1: Measurements common

30、 to terrestrial radio-relay systems and satellite earth stations Sect ion 4: Transmission performance Numro de rfrence Reference number CEIIIEC 60835-1-4: 1992 Numros des publications Depuis le ler janvier 1997, les publications de la CE1 sont numrotes partir de 60000. Publications consolides Les ve

31、rsions consolides de certaines publications de la CE1 incorporant les amendements sont disponibles. Par exemple, les numros ddition 1.0, 1.1 et 1.2 indiquent respectivement la publication de base, la publication de base incorporant lamendement 1, et la publication de base incorporant les amendements

32、 1 et 2. Validit de la prsente publication Le contenu technique des publications de la CE1 est constamment revu par la CE1 afin quil reflte ltat actuel de la technique. Des renseignements relatifs la date de reconfir- mation de la publication sont disponibles dans le Catalogue de la CEI. Les renseig

33、nements relatifs des questions ltude et des travaux en cours entrepris par le comit technique qui a tabli cette publication, ainsi que la liste des publications tablies, se trouvent dans les documents ci- dessous: (Site web de la CEI* Catalogue des publications de la CE1 Publi annuellement et mis jo

34、ur rgulirement (Catalogue en ligne) Bulletin de la CE1 Disponible la fois au Ate web de la CEI* et comme priodique imprim Terminologie, symboles graphiques et littraux En ce qui concerne la terminologie gnrale, le lecteur se reportera ia CE1 60050: Vocabulaire Electro- technique International (VE I)

35、. Pour les symboles graphiques, les symboles littraux et les signes dusage gnral approuvs par la CEI, le lecteur consultera la CE1 60027: Symboles littraux a utiliser en lectrotechnique, la CE1 6041 7: Symboles graphiques utilisables sur le matriel. Index, relev et compilation des feuilles individue

36、lles, et la CE1 60617: Symboles graphiques pour schmas. * Voir adresse site web sur la page de titre. Numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. Consolidated publications Consolidated versions of some IEC publications including amendments

37、 are available. For example, edition numbers 1 .O, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incor- porating amendment 1 and the base publication incorporating amendments 1 and 2. Validity of this publication The technical content of IEC publications is kept unde

38、r constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to the date of the reconfirmation of the publication is available in the IEC catalogue. Information on the subjects under consideration and work in progress undertaken by the technical comm

39、ittee which has prepared this publication, as well as the list of publications issued, is to be found at the following IEC sources: IEC web site“ Catalogue of IEC publications Published yearly with regular updates (On-line catalogue)* Available both at the IEC web site and as a printed periodical IE

40、C Bulletin Terminology, graphical and letter sym bo I s For general terminology, readers are referred to I EC 60050: International Electrotechnical Vocabulary (IEV). For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to publications IEC 6002

41、7: Letter symbols to be used in electrical technology3 IEC 60417: Graphical symbols for use on equipment. Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols for diagrams. * See web site address on title page. NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 608354

42、 -4 Premire dition First edition 1992-04 Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Partie 1: Mesures communes aux faisceaux hertziens terrestres et aux stations terriennes de tlcommunications par satellite Section 4: Qualit de transmis

43、sion Methods of measurement for equipment used in digital microwave radio transmission systems Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations Section 4: Transmission performance O IEC 1992 Droits de reproduction rservs - Copyright - all rights reserved Au

44、cune partie de cette publication ne peut &re reproduite ni No part of this publication may be reproduced or utilized in utilise sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical, procd, lectronique ou mcanique. y compris la photo- including photocopying a

45、nd microfilm, without permission in copie et les microfilms, sans raccord crit de lditeur. writing from the publisher. International Electrotechnical Commission Telefax: +41 22 919 0300 3, rue de Varemb Geneva, Switzerland IEC web site http: /www.iec.ch e-mail: inmailiec.ch M CODE PRIX PRICE CODE Po

46、ur pnx, voir catalogue en vigueur For price, see current catalogue Commission Electrotechnique Internationale International Electrotechnical Commission MemnvHaponHan Jnenpoexrecia HOMHCCHR O -2- SOMMAIRE 835-1 -4 O CE1 Pages AVANT-PROPOS INTRODUCTION Articles Domaine dapplication Taux derreur 2.1 Df

47、inition et gnralits . 2.2 Mthode de mesure . 2.3 Prsentation des rsultats . 2.4 Dtails a spcifier . Paramtres supplmentaires Gigue 4.1 Dfinition et gnralits . 4.2 Mthode de mesure . 4.3 Prsentation des rsultats . 4.4 Dtails a spcifier . Interruption tolre lentre 5.1 Dfinition et gnralits . 5.2 Mthod

48、e de mesure . 5.3 Prsentation des rsultats . 5.4 Dtails a spcifier . Figures Annexe A - Bibliographie . 4 6 8 8 8 10 12 12 12 12 12 14 14 16 16 16 18 18 18 20 24 835-1-4 O IEC -3- CONTENTS Page FOREWORD INTRODUCTION Clause 1 Scope 2 Bit error ratio 2.1 Definition and general considerations . 2.2 Method of measurement 2.3 Presentation of results . 2.4 Details to be specified 3 Additional parameters 4 Timing jitter 4.1 Definition and general considerations . 4.2 Method of measurement 4.3 Presentation of results . 4.4 Details to be specified 5 Acceptable inp

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